On Xe-HP and later devices, we use dedicated compression control state (CCS) stored in local memory for each surface, to support the 3D and media compression formats.
The memory required for the CCS of the entire local memory is 1/256 of the local memory size. So before the kernel boot, the required memory is reserved for the CCS data and a secure register will be programmed with the CCS base address
So when we allocate a object in local memory we dont need to explicitly allocate the space for ccs data. But when we evict the obj into the smem to hold the compression related data along with the obj we need smem space of obj_size + (obj_size/256).
Hence when we create smem for an obj with lmem placement possibility we create with the extra space.
When we are swapping out the local memory obj on flat-ccs capable platform, we need to capture the ccs data too along with main meory and we need to restore it when we are swapping in the content.
When lmem object is swapped into a smem obj, smem obj will have the extra pages required to hold the ccs data corresponding to the lmem main memory. So main memory of lmem will be copied into the initial pages of the smem and then ccs data corresponding to the main memory will be copied to the subsequent pages of smem.
Swapin happens exactly in reverse order. First main memory of lmem is restored from the smem's initial pages and the ccs data will be restored from the subsequent pages of smem.
Extracting and restoring the CCS data is done through a special cmd called XY_CTRL_SURF_COPY_BLT
v3: Fast_Clear_0 is used for clearing the ccs data on obj allocation [Thomas] Migration of main memory and ccs data are done in single request [Thomas] Small optimization patch is added for the migration loop CCS clearing is split into two patches.
Test-with: 20220307121042.23287-4-ramalingam.c@intel.com
Ramalingam C (6): drm/i915/gt: Use XY_FASR_COLOR_BLT to clear obj on graphics ver 12+ drm/i915/gt: Clear compress metadata for Flat-ccs objects drm/ttm: Add a parameter to add extra pages into ttm_tt drm/i915/gem: Add extra pages in ttm_tt for ccs data drm/i915/gt: Optimize the migration loop drm/i915/migrate: Evict and restore the flatccs capable lmem obj
drivers/gpu/drm/drm_gem_vram_helper.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 23 +- drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 23 ++ drivers/gpu/drm/i915/gt/intel_migrate.c | 390 +++++++++++++++++-- drivers/gpu/drm/qxl/qxl_ttm.c | 2 +- drivers/gpu/drm/ttm/ttm_agp_backend.c | 2 +- drivers/gpu/drm/ttm/ttm_tt.c | 12 +- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 2 +- include/drm/ttm/ttm_tt.h | 4 +- 9 files changed, 421 insertions(+), 39 deletions(-)
XY_FAST_COLOR_BLT cmd is faster than the older XY_COLOR_BLT. Hence for clearing (Zero out) the pages of the newly allocated object, faster cmd is used.
Signed-off-by: Ramalingam C ramalingam.c@intel.com Signed-off-by: Chris Wilson chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 5 ++ drivers/gpu/drm/i915/gt/intel_migrate.c | 51 +++++++++++++++++--- 2 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h index d112ffd56418..925e55b6a94f 100644 --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h @@ -205,6 +205,11 @@
#define COLOR_BLT_CMD (2 << 29 | 0x40 << 22 | (5 - 2)) #define XY_COLOR_BLT_CMD (2 << 29 | 0x50 << 22) +#define XY_FAST_COLOR_BLT_CMD (2 << 29 | 0x44 << 22) +#define XY_FAST_COLOR_BLT_DEPTH_32 (2 << 19) +#define XY_FAST_COLOR_BLT_DW 16 +#define XY_FAST_COLOR_BLT_MOCS_MASK GENMASK(27, 21) +#define XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT 31 #define SRC_COPY_BLT_CMD (2 << 29 | 0x43 << 22) #define GEN9_XY_FAST_COPY_BLT_CMD (2 << 29 | 0x42 << 22) #define XY_SRC_COPY_BLT_CMD (2 << 29 | 0x53 << 22) diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index 20444d6ceb3c..cb68f7bf6b28 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -16,6 +16,8 @@ struct insert_pte_data { };
#define CHUNK_SZ SZ_8M /* ~1ms at 8GiB/s preemption delay */ +#define GET_CCS_BYTES(i915, size) (HAS_FLAT_CCS(i915) ? \ + DIV_ROUND_UP(size, NUM_BYTES_PER_CCS_BYTE) : 0)
static bool engine_supports_migration(struct intel_engine_cs *engine) { @@ -614,20 +616,56 @@ intel_context_migrate_copy(struct intel_context *ce, return err; }
-static int emit_clear(struct i915_request *rq, u64 offset, int size, u32 value) +static int emit_clear(struct i915_request *rq, u64 offset, int size, + u32 value, bool is_lmem) { - const int ver = GRAPHICS_VER(rq->engine->i915); - u32 *cs; + struct drm_i915_private *i915 = rq->engine->i915; + int mocs = rq->engine->gt->mocs.uc_index << 1; + const int ver = GRAPHICS_VER(i915); + u32 *cs, mem_type = 0; + int ring_sz;
GEM_BUG_ON(size >> PAGE_SHIFT > S16_MAX);
offset += (u64)rq->engine->instance << 32;
- cs = intel_ring_begin(rq, ver >= 8 ? 8 : 6); + if (ver >= 12) + ring_sz = 16; + else if (ver >= 8) + ring_sz = 8; + else + ring_sz = 6; + + if (!is_lmem) + mem_type = 1 << XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT; + + cs = intel_ring_begin(rq, ring_sz); if (IS_ERR(cs)) return PTR_ERR(cs);
- if (ver >= 8) { + if (ver >= 12) { + *cs++ = XY_FAST_COLOR_BLT_CMD | XY_FAST_COLOR_BLT_DEPTH_32 | + (XY_FAST_COLOR_BLT_DW - 2); + *cs++ = FIELD_PREP(XY_FAST_COLOR_BLT_MOCS_MASK, mocs) | + (PAGE_SIZE - 1); + *cs++ = 0; + *cs++ = size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4; + *cs++ = lower_32_bits(offset); + *cs++ = upper_32_bits(offset); + *cs++ = mem_type; + /* BG7 */ + *cs++ = value; + *cs++ = 0; + *cs++ = 0; + *cs++ = 0; + /* BG11 */ + *cs++ = 0; + *cs++ = 0; + /* BG13 */ + *cs++ = 0; + *cs++ = 0; + *cs++ = 0; + } else if (ver >= 8) { *cs++ = XY_COLOR_BLT_CMD | BLT_WRITE_RGBA | (7 - 2); *cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | PAGE_SIZE; *cs++ = 0; @@ -645,7 +683,6 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, u32 value) *cs++ = lower_32_bits(offset); *cs++ = value; } - intel_ring_advance(rq, cs); return 0; } @@ -711,7 +748,7 @@ intel_context_migrate_clear(struct intel_context *ce, if (err) goto out_rq;
- err = emit_clear(rq, offset, len, value); + err = emit_clear(rq, offset, len, value, is_lmem);
/* Arbitration is re-enabled between requests. */ out_rq:
Hi, Ram.
Typo in patch title FASR/FAST
On Mon, 2022-03-07 at 19:10 +0530, Ramalingam C wrote:
XY_FAST_COLOR_BLT cmd is faster than the older XY_COLOR_BLT. Hence for clearing (Zero out) the pages of the newly allocated object, faster cmd is used.
Signed-off-by: Ramalingam C ramalingam.c@intel.com Signed-off-by: Chris Wilson chris@chris-wilson.co.uk
drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 5 ++ drivers/gpu/drm/i915/gt/intel_migrate.c | 51 +++++++++++++++++- -- 2 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h index d112ffd56418..925e55b6a94f 100644 --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h @@ -205,6 +205,11 @@ #define COLOR_BLT_CMD (2 << 29 | 0x40 << 22 | (5 - 2)) #define XY_COLOR_BLT_CMD (2 << 29 | 0x50 << 22) +#define XY_FAST_COLOR_BLT_CMD (2 << 29 | 0x44 << 22) +#define XY_FAST_COLOR_BLT_DEPTH_32 (2 << 19) +#define XY_FAST_COLOR_BLT_DW 16 +#define XY_FAST_COLOR_BLT_MOCS_MASK GENMASK(27, 21) +#define XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT 31 #define SRC_COPY_BLT_CMD (2 << 29 | 0x43 << 22) #define GEN9_XY_FAST_COPY_BLT_CMD (2 << 29 | 0x42 << 22) #define XY_SRC_COPY_BLT_CMD (2 << 29 | 0x53 << 22) diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index 20444d6ceb3c..cb68f7bf6b28 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -16,6 +16,8 @@ struct insert_pte_data { }; #define CHUNK_SZ SZ_8M /* ~1ms at 8GiB/s preemption delay */ +#define GET_CCS_BYTES(i915, size) (HAS_FLAT_CCS(i915) ? \ + DIV_ROUND_UP(size, NUM_BYTES_PER_CCS_BYTE) : 0) static bool engine_supports_migration(struct intel_engine_cs *engine) { @@ -614,20 +616,56 @@ intel_context_migrate_copy(struct intel_context *ce, return err; } -static int emit_clear(struct i915_request *rq, u64 offset, int size, u32 value) +static int emit_clear(struct i915_request *rq, u64 offset, int size, + u32 value, bool is_lmem) { - const int ver = GRAPHICS_VER(rq->engine->i915); - u32 *cs; + struct drm_i915_private *i915 = rq->engine->i915; + int mocs = rq->engine->gt->mocs.uc_index << 1; + const int ver = GRAPHICS_VER(i915); + u32 *cs, mem_type = 0; + int ring_sz; GEM_BUG_ON(size >> PAGE_SHIFT > S16_MAX); offset += (u64)rq->engine->instance << 32; - cs = intel_ring_begin(rq, ver >= 8 ? 8 : 6); + if (ver >= 12) + ring_sz = 16;
Noting that DG1 doesn't use more than 11 dwords? Doesn't matter much I guess if we pad with NOP.
+ else if (ver >= 8) + ring_sz = 8; + else + ring_sz = 6;
+ if (!is_lmem) + mem_type = 1 << XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT;
Should we use the MEM_TYPE macros so it becomes clearer what we're doing?
Also does DG1 support the mocs and mem_type fields? If not should we set these to 0 for relevant hardware?
+ cs = intel_ring_begin(rq, ring_sz); if (IS_ERR(cs)) return PTR_ERR(cs); - if (ver >= 8) { + if (ver >= 12) { + *cs++ = XY_FAST_COLOR_BLT_CMD | XY_FAST_COLOR_BLT_DEPTH_32 | + (XY_FAST_COLOR_BLT_DW - 2); + *cs++ = FIELD_PREP(XY_FAST_COLOR_BLT_MOCS_MASK, mocs) | + (PAGE_SIZE - 1); + *cs++ = 0; + *cs++ = size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4; + *cs++ = lower_32_bits(offset); + *cs++ = upper_32_bits(offset); + *cs++ = mem_type; + /* BG7 */ + *cs++ = value; + *cs++ = 0; + *cs++ = 0; + *cs++ = 0; + /* BG11 */ + *cs++ = 0; + *cs++ = 0; + /* BG13 */ + *cs++ = 0; + *cs++ = 0; + *cs++ = 0; + } else if (ver >= 8) { *cs++ = XY_COLOR_BLT_CMD | BLT_WRITE_RGBA | (7 - 2); *cs++ = BLT_DEPTH_32 | BLT_ROP_COLOR_COPY | PAGE_SIZE; *cs++ = 0; @@ -645,7 +683,6 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, u32 value) *cs++ = lower_32_bits(offset); *cs++ = value; }
intel_ring_advance(rq, cs); return 0; } @@ -711,7 +748,7 @@ intel_context_migrate_clear(struct intel_context *ce, if (err) goto out_rq; - err = emit_clear(rq, offset, len, value); + err = emit_clear(rq, offset, len, value, is_lmem); /* Arbitration is re-enabled between requests. */ out_rq:
Otherwise looks good.
/Thomas
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Xe-HP and latest devices support Flat CCS which reserved a portion of the device memory to store compression metadata, during the clearing of device memory buffer object we also need to clear the associated CCS buffer.
XY_FAST_COLOR_BLT cmd provides a option to clear the ccs metadata corresponding to the main memory that is cleared. So on Flat-CCS capable platform we use this option to clear the CCS meta data along with main memory.
v2: Fixed issues with platform naming [Lucas] v3: Rebased [Ram] Used the round_up funcs [Bob] v4: Fixed ccs blk calculation [Ram] Added Kdoc on flat-ccs. v5: GENMASK is used [Matt] mocs fix [Matt] Comments Fix [Matt] Flush address programming [Ram] v6: FLUSH_DW is fixed Few coding style fix v7: Adopting the XY_FAST_COLOR_BLT (Thomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Signed-off-by: Ayaz A Siddiqui ayaz.siddiqui@intel.com --- drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 3 ++ drivers/gpu/drm/i915/gt/intel_migrate.c | 39 ++++++++++++++++++-- 2 files changed, 39 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h index 925e55b6a94f..34cead49f35e 100644 --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h @@ -207,8 +207,11 @@ #define XY_COLOR_BLT_CMD (2 << 29 | 0x50 << 22) #define XY_FAST_COLOR_BLT_CMD (2 << 29 | 0x44 << 22) #define XY_FAST_COLOR_BLT_DEPTH_32 (2 << 19) +#define FAST_CLEAR_0 (2 << 12) #define XY_FAST_COLOR_BLT_DW 16 #define XY_FAST_COLOR_BLT_MOCS_MASK GENMASK(27, 21) +#define XY_FAST_COLOR_BLT_AUX_MASK GENMASK(20, 18) +#define XY_FAST_COLOR_BLT_AUX_CCS_E 5 #define XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT 31 #define SRC_COPY_BLT_CMD (2 << 29 | 0x43 << 22) #define GEN9_XY_FAST_COPY_BLT_CMD (2 << 29 | 0x42 << 22) diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index cb68f7bf6b28..05262f1b438e 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -469,6 +469,34 @@ static bool wa_1209644611_applies(int ver, u32 size) return height % 4 == 3 && height <= 8; }
+/** + * DOC: Flat-CCS - Memory compression for Local memory + * + * On Xe-HP and later devices, we use dedicated compression control state (CCS) + * stored in local memory for each surface, to support the 3D and media + * compression formats. + * + * The memory required for the CCS of the entire local memory is 1/256 of the + * local memory size. So before the kernel boot, the required memory is reserved + * for the CCS data and a secure register will be programmed with the CCS base + * address. + * + * Flat CCS data needs to be cleared when a lmem object is allocated. + * And CCS data can be copied in and out of CCS region through + * XY_CTRL_SURF_COPY_BLT. CPU can't access the CCS data directly. + * + * When we exhaust the lmem, if the object's placements support smem, then we can + * directly decompress the compressed lmem object into smem and start using it + * from smem itself. + * + * But when we need to swapout the compressed lmem object into a smem region + * though objects' placement doesn't support smem, then we copy the lmem content + * as it is into smem region along with ccs data (using XY_CTRL_SURF_COPY_BLT). + * When the object is referred, lmem content will be swaped in along with + * restoration of the CCS data (using XY_CTRL_SURF_COPY_BLT) at corresponding + * location. + */ + static int emit_copy(struct i915_request *rq, u32 dst_offset, u32 src_offset, int size) { @@ -621,8 +649,8 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, { struct drm_i915_private *i915 = rq->engine->i915; int mocs = rq->engine->gt->mocs.uc_index << 1; + u32 *cs, spl_mode = 0, aux = 0, mem_type = 0; const int ver = GRAPHICS_VER(i915); - u32 *cs, mem_type = 0; int ring_sz;
GEM_BUG_ON(size >> PAGE_SHIFT > S16_MAX); @@ -644,10 +672,15 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, return PTR_ERR(cs);
if (ver >= 12) { + if (HAS_FLAT_CCS(i915)) { + spl_mode = FAST_CLEAR_0; + aux = FIELD_PREP(XY_FAST_COLOR_BLT_AUX_MASK, + XY_FAST_COLOR_BLT_AUX_CCS_E); + } *cs++ = XY_FAST_COLOR_BLT_CMD | XY_FAST_COLOR_BLT_DEPTH_32 | - (XY_FAST_COLOR_BLT_DW - 2); + spl_mode | (XY_FAST_COLOR_BLT_DW - 2); *cs++ = FIELD_PREP(XY_FAST_COLOR_BLT_MOCS_MASK, mocs) | - (PAGE_SIZE - 1); + (PAGE_SIZE - 1) | aux; *cs++ = 0; *cs++ = size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4; *cs++ = lower_32_bits(offset);
On Mon, 2022-03-07 at 19:10 +0530, Ramalingam C wrote:
Xe-HP and latest devices support Flat CCS which reserved a portion of the device memory to store compression metadata, during the clearing of device memory buffer object we also need to clear the associated CCS buffer.
XY_FAST_COLOR_BLT cmd provides a option to clear the ccs metadata corresponding to the main memory that is cleared. So on Flat-CCS capable platform we use this option to clear the CCS meta data along with main memory.
v2: Fixed issues with platform naming [Lucas] v3: Rebased [Ram] Used the round_up funcs [Bob] v4: Fixed ccs blk calculation [Ram] Added Kdoc on flat-ccs. v5: GENMASK is used [Matt] mocs fix [Matt] Comments Fix [Matt] Flush address programming [Ram] v6: FLUSH_DW is fixed Few coding style fix v7: Adopting the XY_FAST_COLOR_BLT (Thomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Signed-off-by: Ayaz A Siddiqui ayaz.siddiqui@intel.com
drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 3 ++ drivers/gpu/drm/i915/gt/intel_migrate.c | 39 ++++++++++++++++++-- 2 files changed, 39 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h index 925e55b6a94f..34cead49f35e 100644 --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h @@ -207,8 +207,11 @@ #define XY_COLOR_BLT_CMD (2 << 29 | 0x50 << 22) #define XY_FAST_COLOR_BLT_CMD (2 << 29 | 0x44 << 22) #define XY_FAST_COLOR_BLT_DEPTH_32 (2 << 19) +#define FAST_CLEAR_0 (2 << 12) #define XY_FAST_COLOR_BLT_DW 16 #define XY_FAST_COLOR_BLT_MOCS_MASK GENMASK(27, 21) +#define XY_FAST_COLOR_BLT_AUX_MASK GENMASK(20, 18) +#define XY_FAST_COLOR_BLT_AUX_CCS_E 5 #define XY_FAST_COLOR_BLT_MEM_TYPE_SHIFT 31 #define SRC_COPY_BLT_CMD (2 << 29 | 0x43 << 22) #define GEN9_XY_FAST_COPY_BLT_CMD (2 << 29 | 0x42 << 22) diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index cb68f7bf6b28..05262f1b438e 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -469,6 +469,34 @@ static bool wa_1209644611_applies(int ver, u32 size) return height % 4 == 3 && height <= 8; } +/**
- DOC: Flat-CCS - Memory compression for Local memory
- On Xe-HP and later devices, we use dedicated compression control
state (CCS)
- stored in local memory for each surface, to support the 3D and
media
- compression formats.
- The memory required for the CCS of the entire local memory is
1/256 of the
- local memory size. So before the kernel boot, the required memory
is reserved
- for the CCS data and a secure register will be programmed with
the CCS base
- address.
- Flat CCS data needs to be cleared when a lmem object is
allocated.
- And CCS data can be copied in and out of CCS region through
- XY_CTRL_SURF_COPY_BLT. CPU can't access the CCS data directly.
- When we exhaust the lmem, if the object's placements support
smem, then we can
- directly decompress the compressed lmem object into smem and
start using it
- from smem itself.
- But when we need to swapout the compressed lmem object into a
smem region
- though objects' placement doesn't support smem, then we copy the
lmem content
- as it is into smem region along with ccs data (using
XY_CTRL_SURF_COPY_BLT).
- When the object is referred, lmem content will be swaped in along
with
- restoration of the CCS data (using XY_CTRL_SURF_COPY_BLT) at
corresponding
- location.
- */
static int emit_copy(struct i915_request *rq, u32 dst_offset, u32 src_offset, int size) { @@ -621,8 +649,8 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, { struct drm_i915_private *i915 = rq->engine->i915; int mocs = rq->engine->gt->mocs.uc_index << 1; + u32 *cs, spl_mode = 0, aux = 0, mem_type = 0; const int ver = GRAPHICS_VER(i915); - u32 *cs, mem_type = 0; int ring_sz; GEM_BUG_ON(size >> PAGE_SHIFT > S16_MAX); @@ -644,10 +672,15 @@ static int emit_clear(struct i915_request *rq, u64 offset, int size, return PTR_ERR(cs); if (ver >= 12) { + if (HAS_FLAT_CCS(i915)) { + spl_mode = FAST_CLEAR_0; + aux = FIELD_PREP(XY_FAST_COLOR_BLT_AUX_MASK,
Did you have a chance to verify that this actually works, and whether setting aux will clear just the CCS data or both CCS & main DATA?
If so, Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com
+ XY_FAST_COLOR_BLT_AUX_CCS_E); + } *cs++ = XY_FAST_COLOR_BLT_CMD | XY_FAST_COLOR_BLT_DEPTH_32 | - (XY_FAST_COLOR_BLT_DW - 2); + spl_mode | (XY_FAST_COLOR_BLT_DW - 2); *cs++ = FIELD_PREP(XY_FAST_COLOR_BLT_MOCS_MASK, mocs) | - (PAGE_SIZE - 1); + (PAGE_SIZE - 1) | aux; *cs++ = 0; *cs++ = size >> PAGE_SHIFT << 16 | PAGE_SIZE / 4; *cs++ = lower_32_bits(offset);
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Add a parameter called "extra_pages" for ttm_tt_init, to indicate that driver needs extra pages in ttm_tt.
v2: Used imperative wording [Thomas and Christian]
Signed-off-by: Ramalingam C ramalingam.c@intel.com cc: Christian Koenig christian.koenig@amd.com cc: Hellstrom Thomas thomas.hellstrom@intel.com Reviewed-by: Thomas Hellstrom thomas.hellstrom@linux.intel.com Reviewed-by: Christian Konig christian.koenig@amd.com --- drivers/gpu/drm/drm_gem_vram_helper.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 +- drivers/gpu/drm/qxl/qxl_ttm.c | 2 +- drivers/gpu/drm/ttm/ttm_agp_backend.c | 2 +- drivers/gpu/drm/ttm/ttm_tt.c | 12 +++++++----- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 2 +- include/drm/ttm/ttm_tt.h | 4 +++- 7 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index dc7f938bfff2..123045b58fec 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -867,7 +867,7 @@ static struct ttm_tt *bo_driver_ttm_tt_create(struct ttm_buffer_object *bo, if (!tt) return NULL;
- ret = ttm_tt_init(tt, bo, page_flags, ttm_cached); + ret = ttm_tt_init(tt, bo, page_flags, ttm_cached, 0); if (ret < 0) goto err_ttm_tt_init;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 45cc5837ce00..1a8262f5f692 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -283,7 +283,7 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, i915_tt->is_shmem = true; }
- ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching); + ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, 0); if (ret) goto err_free;
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c index b2e33d5ba5d0..52156b54498f 100644 --- a/drivers/gpu/drm/qxl/qxl_ttm.c +++ b/drivers/gpu/drm/qxl/qxl_ttm.c @@ -113,7 +113,7 @@ static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); if (ttm == NULL) return NULL; - if (ttm_tt_init(ttm, bo, page_flags, ttm_cached)) { + if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) { kfree(ttm); return NULL; } diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c index 6ddc16f0fe2b..d27691f2e451 100644 --- a/drivers/gpu/drm/ttm/ttm_agp_backend.c +++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c @@ -134,7 +134,7 @@ struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo, agp_be->mem = NULL; agp_be->bridge = bridge;
- if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined)) { + if (ttm_tt_init(&agp_be->ttm, bo, page_flags, ttm_write_combined, 0)) { kfree(agp_be); return NULL; } diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index d234aab800a0..1a66d9fc589a 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -134,9 +134,10 @@ void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm) static void ttm_tt_init_fields(struct ttm_tt *ttm, struct ttm_buffer_object *bo, uint32_t page_flags, - enum ttm_caching caching) + enum ttm_caching caching, + unsigned long extra_pages) { - ttm->num_pages = PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT; + ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages; ttm->caching = ttm_cached; ttm->page_flags = page_flags; ttm->dma_address = NULL; @@ -146,9 +147,10 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm, }
int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo, - uint32_t page_flags, enum ttm_caching caching) + uint32_t page_flags, enum ttm_caching caching, + unsigned long extra_pages) { - ttm_tt_init_fields(ttm, bo, page_flags, caching); + ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);
if (ttm_tt_alloc_page_directory(ttm)) { pr_err("Failed allocating page table\n"); @@ -180,7 +182,7 @@ int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo, { int ret;
- ttm_tt_init_fields(ttm, bo, page_flags, caching); + ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);
if (page_flags & TTM_TT_FLAG_EXTERNAL) ret = ttm_sg_tt_alloc_page_directory(ttm); diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c index b84ecc6d6611..4e3938e62c08 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c @@ -517,7 +517,7 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo, ttm_cached); else ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags, - ttm_cached); + ttm_cached, 0); if (unlikely(ret != 0)) goto out_no_init;
diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h index f20832139815..17a0310e8aaa 100644 --- a/include/drm/ttm/ttm_tt.h +++ b/include/drm/ttm/ttm_tt.h @@ -140,6 +140,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc); * @bo: The buffer object we create the ttm for. * @page_flags: Page flags as identified by TTM_TT_FLAG_XX flags. * @caching: the desired caching state of the pages + * @extra_pages: Extra pages needed for the driver. * * Create a struct ttm_tt to back data with system memory pages. * No pages are actually allocated. @@ -147,7 +148,8 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc); * NULL: Out of memory. */ int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo, - uint32_t page_flags, enum ttm_caching caching); + uint32_t page_flags, enum ttm_caching caching, + unsigned long extra_pages); int ttm_sg_tt_init(struct ttm_tt *ttm_dma, struct ttm_buffer_object *bo, uint32_t page_flags, enum ttm_caching caching);
On Xe-HP and later devices, dedicated compression control state (CCS) stored in local memory is used for each surface, to support the 3D and media compression formats.
The memory required for the CCS of the entire local memory is 1/256 of the local memory size. So before the kernel boot, the required memory is reserved for the CCS data and a secure register will be programmed with the CCS base address
So when an object is allocated in local memory, dont need to explicitly allocate the space for ccs data. But when the obj is evicted into the smem, to hold the compression related data along with the obj extra space is needed in smem. i.e obj_size + (obj_size/256).
Hence when a smem pages are allocated for an obj with lmem placement possibility we create with the extra pages required for the ccs data for the obj size.
v2: Used imperative wording [Thomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com cc: Christian Koenig christian.koenig@amd.com cc: Hellstrom Thomas thomas.hellstrom@intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com --- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 1a8262f5f692..c7a36861c38d 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -20,6 +20,7 @@ #include "gem/i915_gem_ttm.h" #include "gem/i915_gem_ttm_move.h" #include "gem/i915_gem_ttm_pm.h" +#include "gt/intel_gpu_commands.h"
#define I915_TTM_PRIO_PURGE 0 #define I915_TTM_PRIO_NO_PAGES 1 @@ -255,12 +256,27 @@ static const struct i915_refct_sgt_ops tt_rsgt_ops = { .release = i915_ttm_tt_release };
+static inline bool +i915_gem_object_has_lmem_placement(struct drm_i915_gem_object *obj) +{ + int i; + + for (i = 0; i < obj->mm.n_placements; i++) + if (obj->mm.placements[i]->type == INTEL_MEMORY_LOCAL) + return true; + + return false; +} + static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags) { + struct drm_i915_private *i915 = container_of(bo->bdev, typeof(*i915), + bdev); struct ttm_resource_manager *man = ttm_manager_type(bo->bdev, bo->resource->mem_type); struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo); + unsigned long ccs_pages = 0; enum ttm_caching caching; struct i915_ttm_tt *i915_tt; int ret; @@ -283,7 +299,12 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, i915_tt->is_shmem = true; }
- ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, 0); + if (HAS_FLAT_CCS(i915) && i915_gem_object_has_lmem_placement(obj)) + ccs_pages = DIV_ROUND_UP(DIV_ROUND_UP(bo->base.size, + NUM_BYTES_PER_CCS_BYTE), + PAGE_SIZE); + + ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, ccs_pages); if (ret) goto err_free;
On 07/03/2022 13:40, Ramalingam C wrote:
On Xe-HP and later devices, dedicated compression control state (CCS) stored in local memory is used for each surface, to support the 3D and media compression formats.
The memory required for the CCS of the entire local memory is 1/256 of the local memory size. So before the kernel boot, the required memory is reserved for the CCS data and a secure register will be programmed with the CCS base address
So when an object is allocated in local memory, dont need to explicitly allocate the space for ccs data. But when the obj is evicted into the smem, to hold the compression related data along with the obj extra space is needed in smem. i.e obj_size + (obj_size/256).
Hence when a smem pages are allocated for an obj with lmem placement possibility we create with the extra pages required for the ccs data for the obj size.
v2: Used imperative wording [Thomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com cc: Christian Koenig christian.koenig@amd.com cc: Hellstrom Thomas thomas.hellstrom@intel.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com
drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 1a8262f5f692..c7a36861c38d 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -20,6 +20,7 @@ #include "gem/i915_gem_ttm.h" #include "gem/i915_gem_ttm_move.h" #include "gem/i915_gem_ttm_pm.h" +#include "gt/intel_gpu_commands.h"
#define I915_TTM_PRIO_PURGE 0 #define I915_TTM_PRIO_NO_PAGES 1 @@ -255,12 +256,27 @@ static const struct i915_refct_sgt_ops tt_rsgt_ops = { .release = i915_ttm_tt_release };
+static inline bool +i915_gem_object_has_lmem_placement(struct drm_i915_gem_object *obj) +{
- int i;
- for (i = 0; i < obj->mm.n_placements; i++)
if (obj->mm.placements[i]->type == INTEL_MEMORY_LOCAL)return true;- return false;
+}
- static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags) {
- struct drm_i915_private *i915 = container_of(bo->bdev, typeof(*i915),
bdev);- unsigned long ccs_pages = 0; enum ttm_caching caching; struct i915_ttm_tt *i915_tt; int ret;
@@ -283,7 +299,12 @@ static struct ttm_tt *i915_ttm_tt_create(struct ttm_buffer_object *bo, i915_tt->is_shmem = true; }
- ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, 0);
- if (HAS_FLAT_CCS(i915) && i915_gem_object_has_lmem_placement(obj))
ccs_pages = DIV_ROUND_UP(DIV_ROUND_UP(bo->base.size,NUM_BYTES_PER_CCS_BYTE),PAGE_SIZE);
Did you figure out how to handle the case where we have LMEM + SMEM, and are unable to place the object into LMEM, and then it just ends up being kept in SMEM? AFAIK the vm.insert_entries code has always just assumed that the vma sg_table size is the same as the vma->size, and so will happily create PTEs for the hidden ccs page(s), which might corrupt the users vm, depending on the exact layout.
Also it looks like the _shmem_writeback() call should now use ttm_tt->num_pages, instead of the object size?
- ret = ttm_tt_init(&i915_tt->ttm, bo, page_flags, caching, ccs_pages); if (ret) goto err_free;
Move the static calculations out of the loop.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/gpu/drm/i915/gt/intel_migrate.c | 34 ++++++++++++------------- 1 file changed, 16 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index 05262f1b438e..24e0e73e4a90 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -556,6 +556,7 @@ intel_context_migrate_copy(struct intel_context *ce, struct i915_request **out) { struct sgt_dma it_src = sg_sgt(src), it_dst = sg_sgt(dst); + u32 src_offset, dst_offset; struct i915_request *rq; int err;
@@ -564,8 +565,20 @@ intel_context_migrate_copy(struct intel_context *ce,
GEM_BUG_ON(ce->ring->size < SZ_64K);
+ src_offset = 0; + dst_offset = CHUNK_SZ; + if (HAS_64K_PAGES(ce->engine->i915)) { + GEM_BUG_ON(!src_is_lmem && !dst_is_lmem); + + src_offset = 0; + dst_offset = 0; + if (src_is_lmem) + src_offset = CHUNK_SZ; + if (dst_is_lmem) + dst_offset = 2 * CHUNK_SZ; + } + do { - u32 src_offset, dst_offset; int len;
rq = i915_request_create(ce); @@ -593,19 +606,6 @@ intel_context_migrate_copy(struct intel_context *ce, if (err) goto out_rq;
- src_offset = 0; - dst_offset = CHUNK_SZ; - if (HAS_64K_PAGES(ce->engine->i915)) { - GEM_BUG_ON(!src_is_lmem && !dst_is_lmem); - - src_offset = 0; - dst_offset = 0; - if (src_is_lmem) - src_offset = CHUNK_SZ; - if (dst_is_lmem) - dst_offset = 2 * CHUNK_SZ; - } - len = emit_pte(rq, &it_src, src_cache_level, src_is_lmem, src_offset, CHUNK_SZ); if (len <= 0) { @@ -615,12 +615,10 @@ intel_context_migrate_copy(struct intel_context *ce,
err = emit_pte(rq, &it_dst, dst_cache_level, dst_is_lmem, dst_offset, len); - if (err < 0) - goto out_rq; - if (err < len) { + if (err < len) err = -EINVAL; + if (err < 0) goto out_rq; - }
err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); if (err)
When we are swapping out the local memory obj on flat-ccs capable platform, we need to capture the ccs data too along with main meory and we need to restore it when we are swapping in the content.
When lmem object is swapped into a smem obj, smem obj will have the extra pages required to hold the ccs data corresponding to the lmem main memory. So main memory of lmem will be copied into the initial pages of the smem and then ccs data corresponding to the main memory will be copied to the subsequent pages of smem. ccs data is 1/256 of lmem size.
Swapin happens exactly in reverse order. First main memory of lmem is restored from the smem's initial pages and the ccs data will be restored from the subsequent pages of smem.
Extracting and restoring the CCS data is done through a special cmd called XY_CTRL_SURF_COPY_BLT
v2: Fixing the ccs handling v3: Handle the ccs data at same loop as main memory [Thomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 15 + drivers/gpu/drm/i915/gt/intel_migrate.c | 274 ++++++++++++++++++- 2 files changed, 285 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h index 34cead49f35e..fa428a67620e 100644 --- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h +++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h @@ -153,8 +153,10 @@ #define MI_FLUSH_DW_PROTECTED_MEM_EN (1 << 22) #define MI_FLUSH_DW_STORE_INDEX (1<<21) #define MI_INVALIDATE_TLB (1<<18) +#define MI_FLUSH_DW_CCS (1<<16) #define MI_FLUSH_DW_OP_STOREDW (1<<14) #define MI_FLUSH_DW_OP_MASK (3<<14) +#define MI_FLUSH_DW_LLC (1<<9) #define MI_FLUSH_DW_NOTIFY (1<<8) #define MI_INVALIDATE_BSD (1<<7) #define MI_FLUSH_DW_USE_GTT (1<<2) @@ -203,6 +205,19 @@ #define GFX_OP_DRAWRECT_INFO ((0x3<<29)|(0x1d<<24)|(0x80<<16)|(0x3)) #define GFX_OP_DRAWRECT_INFO_I965 ((0x7900<<16)|0x2)
+#define XY_CTRL_SURF_INSTR_SIZE 5 +#define MI_FLUSH_DW_SIZE 3 +#define XY_CTRL_SURF_COPY_BLT ((2 << 29) | (0x48 << 22) | 3) +#define SRC_ACCESS_TYPE_SHIFT 21 +#define DST_ACCESS_TYPE_SHIFT 20 +#define CCS_SIZE_MASK GENMASK(17, 8) +#define XY_CTRL_SURF_MOCS_MASK GENMASK(31, 25) +#define NUM_CCS_BYTES_PER_BLOCK 256 +#define NUM_BYTES_PER_CCS_BYTE 256 +#define NUM_CCS_BLKS_PER_XFER 1024 +#define INDIRECT_ACCESS 0 +#define DIRECT_ACCESS 1 + #define COLOR_BLT_CMD (2 << 29 | 0x40 << 22 | (5 - 2)) #define XY_COLOR_BLT_CMD (2 << 29 | 0x50 << 22) #define XY_FAST_COLOR_BLT_CMD (2 << 29 | 0x44 << 22) diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c index 24e0e73e4a90..6d2181725d76 100644 --- a/drivers/gpu/drm/i915/gt/intel_migrate.c +++ b/drivers/gpu/drm/i915/gt/intel_migrate.c @@ -497,6 +497,120 @@ static bool wa_1209644611_applies(int ver, u32 size) * location. */
+static inline u32 *i915_flush_dw(u32 *cmd, u32 flags) +{ + *cmd++ = MI_FLUSH_DW | flags; + *cmd++ = 0; + *cmd++ = 0; + + return cmd; +} + +static u32 calc_ctrl_surf_instr_size(struct drm_i915_private *i915, int size) +{ + u32 num_cmds, num_blks, total_size; + + if (!GET_CCS_BYTES(i915, size)) + return 0; + + /* + * XY_CTRL_SURF_COPY_BLT transfers CCS in 256 byte + * blocks. one XY_CTRL_SURF_COPY_BLT command can + * transfer upto 1024 blocks. + */ + num_blks = DIV_ROUND_UP(GET_CCS_BYTES(i915, size), + NUM_CCS_BYTES_PER_BLOCK); + num_cmds = DIV_ROUND_UP(num_blks, NUM_CCS_BLKS_PER_XFER); + total_size = XY_CTRL_SURF_INSTR_SIZE * num_cmds; + + /* + * Adding a flush before and after XY_CTRL_SURF_COPY_BLT + */ + total_size += 2 * MI_FLUSH_DW_SIZE; + + return total_size; +} + +static u32 *_i915_ctrl_surf_copy_blt(u32 *cmd, u64 src_addr, u64 dst_addr, + u8 src_mem_access, u8 dst_mem_access, + int src_mocs, int dst_mocs, + u32 ccs_blocks) +{ + /* + * The XY_CTRL_SURF_COPY_BLT instruction is used to copy the CCS + * data in and out of the CCS region. + * + * We can copy at most 1024 blocks of 256 bytes using one + * XY_CTRL_SURF_COPY_BLT instruction. + * + * In case we need to copy more than 1024 blocks, we need to add + * another instruction to the same batch buffer. + * + * 1024 blocks of 256 bytes of CCS represent a total 256KB of CCS. + * + * 256 KB of CCS represents 256 * 256 KB = 64 MB of LMEM. + */ + do { + int blks_per_copy; + + blks_per_copy = ccs_blocks >= NUM_CCS_BLKS_PER_XFER ? + NUM_CCS_BLKS_PER_XFER : ccs_blocks; + *cmd++ = XY_CTRL_SURF_COPY_BLT | + src_mem_access << SRC_ACCESS_TYPE_SHIFT | + dst_mem_access << DST_ACCESS_TYPE_SHIFT | + FIELD_PREP(CCS_SIZE_MASK, blks_per_copy - 1); + *cmd++ = lower_32_bits(src_addr); + *cmd++ = (upper_32_bits(src_addr) & 0xFFFF) | + FIELD_PREP(XY_CTRL_SURF_MOCS_MASK, src_mocs); + *cmd++ = lower_32_bits(dst_addr); + *cmd++ = (upper_32_bits(dst_addr) & 0xFFFF) | + FIELD_PREP(XY_CTRL_SURF_MOCS_MASK, dst_mocs); + src_addr += SZ_64M; + dst_addr += SZ_64M; + ccs_blocks -= blks_per_copy; + } while (ccs_blocks > 0); + + return cmd; +} + +static int emit_ccs_copy(struct i915_request *rq, + bool dst_is_lmem, u32 dst_offset, + bool src_is_lmem, u32 src_offset, int size) +{ + struct drm_i915_private *i915 = rq->engine->i915; + int mocs = rq->engine->gt->mocs.uc_index << 1; + u32 num_ccs_blks, ccs_ring_size; + u8 src_access, dst_access; + u32 *cs; + + GEM_BUG_ON(!(src_is_lmem ^ dst_is_lmem) || !HAS_FLAT_CCS(i915)); + + ccs_ring_size = calc_ctrl_surf_instr_size(i915, size); + WARN_ON(!ccs_ring_size); + + cs = intel_ring_begin(rq, round_up(ccs_ring_size, 2)); + if (IS_ERR(cs)) + return PTR_ERR(cs); + + num_ccs_blks = DIV_ROUND_UP(GET_CCS_BYTES(i915, size), + NUM_CCS_BYTES_PER_BLOCK); + + src_access = !src_is_lmem && dst_is_lmem; + dst_access = !src_access; + + cs = i915_flush_dw(cs, MI_FLUSH_DW_LLC | MI_FLUSH_DW_CCS); + cs = _i915_ctrl_surf_copy_blt(cs, src_offset, dst_offset, + src_access, dst_access, + mocs, mocs, num_ccs_blks); + cs = i915_flush_dw(cs, MI_FLUSH_DW_LLC | MI_FLUSH_DW_CCS); + if (ccs_ring_size & 1) + *cs++ = MI_NOOP; + + intel_ring_advance(rq, cs); + + return 0; +} + static int emit_copy(struct i915_request *rq, u32 dst_offset, u32 src_offset, int size) { @@ -544,6 +658,65 @@ static int emit_copy(struct i915_request *rq, return 0; }
+static int scatter_list_length(struct scatterlist *sg) +{ + int len = 0; + + while (sg && sg_dma_len(sg)) { + len += sg_dma_len(sg); + sg = sg_next(sg); + }; + + return len; +} + +static void +calculate_chunk_sz(struct drm_i915_private *i915, bool src_is_lmem, + int *src_sz, int *ccs_sz, u32 bytes_to_cpy, + u32 ccs_bytes_to_cpy) +{ + if (ccs_bytes_to_cpy) { + /* + * We can only copy the ccs data corresponding to + * the CHUNK_SZ of lmem which is + * GET_CCS_BYTES(i915, CHUNK_SZ)) + */ + *ccs_sz = min_t(int, ccs_bytes_to_cpy, GET_CCS_BYTES(i915, CHUNK_SZ)); + + if (!src_is_lmem) + /* + * When CHUNK_SZ is passed all the pages upto CHUNK_SZ + * will be taken for the blt. in Flat-ccs supported + * platform Smem obj will have more pages than required + * for main meory hence limit it to the required size + * for main memory + */ + *src_sz = min_t(int, bytes_to_cpy, CHUNK_SZ); + } else { /* ccs handling is not required */ + *src_sz = CHUNK_SZ; + } +} + +static void get_ccs_sg_sgt(struct sgt_dma *it, u32 bytes_to_cpy) +{ + u32 len; + + do { + GEM_BUG_ON(!it->sg || !sg_dma_len(it->sg)); + len = it->max - it->dma; + if (len > bytes_to_cpy) { + it->dma += bytes_to_cpy; + break; + } + + bytes_to_cpy -= len; + + it->sg = __sg_next(it->sg); + it->dma = sg_dma_address(it->sg); + it->max = it->dma + sg_dma_len(it->sg); + } while (bytes_to_cpy); +} + int intel_context_migrate_copy(struct intel_context *ce, const struct i915_deps *deps, @@ -555,9 +728,14 @@ intel_context_migrate_copy(struct intel_context *ce, bool dst_is_lmem, struct i915_request **out) { - struct sgt_dma it_src = sg_sgt(src), it_dst = sg_sgt(dst); + struct sgt_dma it_src = sg_sgt(src), it_dst = sg_sgt(dst), it_ccs; + struct drm_i915_private *i915 = ce->engine->i915; + u32 ccs_bytes_to_cpy = 0, bytes_to_cpy; + enum i915_cache_level ccs_cache_level; + int src_sz, dst_sz, ccs_sz; u32 src_offset, dst_offset; struct i915_request *rq; + bool ccs_is_src; int err;
GEM_BUG_ON(ce->vm != ce->engine->gt->migrate.context->vm); @@ -565,6 +743,35 @@ intel_context_migrate_copy(struct intel_context *ce,
GEM_BUG_ON(ce->ring->size < SZ_64K);
+ src_sz = scatter_list_length(src); + bytes_to_cpy = src_sz; + + if (HAS_FLAT_CCS(i915) && src_is_lmem ^ dst_is_lmem) { + dst_sz = scatter_list_length(dst); + if (src_is_lmem) { + it_ccs = it_dst; + ccs_cache_level = dst_cache_level; + ccs_is_src = false; + } else if (dst_is_lmem) { + bytes_to_cpy = dst_sz; + it_ccs = it_src; + ccs_cache_level = src_cache_level; + ccs_is_src = true; + } + + /* + * When there is a eviction of ccs needed smem will have the + * extra pages for the ccs data + * + * TO-DO: Want to move the size mismatch check to a WARN_ON, + * but still we have some requests of smem->lmem with same size. + * Need to fix it. + */ + ccs_bytes_to_cpy = src_sz != dst_sz ? GET_CCS_BYTES(i915, bytes_to_cpy) : 0; + if (ccs_bytes_to_cpy) + get_ccs_sg_sgt(&it_ccs, bytes_to_cpy); + } + src_offset = 0; dst_offset = CHUNK_SZ; if (HAS_64K_PAGES(ce->engine->i915)) { @@ -606,8 +813,11 @@ intel_context_migrate_copy(struct intel_context *ce, if (err) goto out_rq;
+ calculate_chunk_sz(i915, src_is_lmem, &src_sz, &ccs_sz, + bytes_to_cpy, ccs_bytes_to_cpy); + len = emit_pte(rq, &it_src, src_cache_level, src_is_lmem, - src_offset, CHUNK_SZ); + src_offset, src_sz); if (len <= 0) { err = len; goto out_rq; @@ -624,7 +834,47 @@ intel_context_migrate_copy(struct intel_context *ce, if (err) goto out_rq;
- err = emit_copy(rq, dst_offset, src_offset, len); + err = emit_copy(rq, dst_offset, src_offset, len); + if (err) + goto out_rq; + + bytes_to_cpy -= len; + + if (ccs_bytes_to_cpy) { + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); + if (err) + goto out_rq; + + err = emit_pte(rq, &it_ccs, ccs_cache_level, false, + ccs_is_src ? src_offset : dst_offset, + ccs_sz); + + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE); + if (err) + goto out_rq; + + /* + * Using max of src_sz and dst_sz, as we need to + * pass the lmem size corresponding to the ccs + * blocks we need to handle. + */ + ccs_sz = max_t(int, ccs_is_src ? ccs_sz : src_sz, + ccs_is_src ? dst_sz : ccs_sz); + + err = emit_ccs_copy(rq, dst_is_lmem, dst_offset, + src_is_lmem, src_offset, ccs_sz); + if (err) + goto out_rq; + + err = rq->engine->emit_flush(rq, EMIT_INVALIDATE | + MI_FLUSH_DW_CCS); + if (err) + goto out_rq; + + /* Converting back to ccs bytes */ + ccs_sz = GET_CCS_BYTES(rq->engine->i915, ccs_sz); + ccs_bytes_to_cpy -= ccs_sz; + }
/* Arbitration is re-enabled between requests. */ out_rq: @@ -632,8 +882,24 @@ intel_context_migrate_copy(struct intel_context *ce, i915_request_put(*out); *out = i915_request_get(rq); i915_request_add(rq); - if (err || !it_src.sg || !sg_dma_len(it_src.sg)) + + if (err) + break; + + if (!bytes_to_cpy && !ccs_bytes_to_cpy) { + if (src_is_lmem) + WARN_ON(it_src.sg && sg_dma_len(it_src.sg)); + else + WARN_ON(it_dst.sg && sg_dma_len(it_dst.sg)); + break; + } + + if (WARN_ON(!it_src.sg || !sg_dma_len(it_src.sg) || + !it_dst.sg || !sg_dma_len(it_dst.sg) || + !it_ccs.sg || !sg_dma_len(it_ccs.sg))) { + err = -EINVAL; break; + }
cond_resched(); } while (1);
dri-devel@lists.freedesktop.org
-
Hellstrom, Thomas -
Matthew Auld -
Ramalingam C